I made a hair rat out of pantyhose so I could 'bump' the hair at the crown of my head.  However, not only does the rat slide around everywhere while I'm trying to put hair over it (even with a pin through the bottom of the rat, pinning it to my hair), but my hair on top slides off the sides!  >:(  Has anyone else ever tried to do this?  Am I doing something wrong?  I'm considering putting some Velcro on it, but I think Velcro might be harmful to my hair.  Any other ideas?

Thanks!

Try wrapping it in a hairnet.  I have some rats from Patrick Cameron that are synthetic hair in a hairnet.  Works great.

Um, Velcro is asking for trouble.

Eeek!  NO VELCRO!!!!!! I can't tell you how many times I've gotten a braid tangled with velcro. I do everything possible to keep it as far from my hair as possible.

As for the rat, the nylon is slippery, so covering it with a hairnet or some other hair safe material that has some texture should work.

I made my own hair rat with synthetic hair and a hair net, and I just use pins to hold it in place.  Bc it is basically hair in a net, the pins hold it just like they would hold my real hair :)  I use Amish pins bc I have thick hair, but bobby pins might work good for you for a tighter grip.